1920
| Dates | Events | |
|---|---|---|
| January 10 | First meeting of the League of Nations held in London. Official end of World War I. | Details |
| Free City of Danzig established. | Details | |
| January 21 | The Paris Peace Conference ends. | Details |
| February 10 | A plebiscite returns Northern Schleswig to Denmark. | Details |
| April 19–April 26 | Conference of Sanremo, Italy, about League of Nations mandates in former Ottoman territories of the Middle East. | Details |
| June 4 | Treaty of Trianon between the Allies and Hungary. | Details |
| August 10 | Treaty of Sèvres between the Allies and the Ottoman Empire. The treaty is not recognized by the Turkish national movement, which considers the Istanbul government illegitimate. | Details |
| September 8 | Gabriele D'Annunzio proclaims in Fiume the Italian Regency of Carnaro. | Details |
| November 1 | League of Nations headquarters moved to Geneva, Switzerland. | Details |
| November 12 | Treaty of Rapallo between Italy and Yugoslavia. Zadar is annexed by Italy and the Free State of Fiume is established. | Details |
| November 15 | The League of Nations holds its first general assembly. | Details |
Read more about this topic: Timeline Of World War I